<template>
  <div class="flexbox">
    <div class="item one">123</div>
    <div class="item two">456</div>
    <div class="item three">
      789
      <template></template>
    </div>
  </div>
</template>

<script setup></script>

<style lang="scss" scoped>
.flexbox {
  height: 600px;
  width: 100%;
  background: red;
  flex-flow: column;
  display: flex;
  gap: 20px;

  .item {
    background: green;
    width: 100%;
    height: 100px;
    border: 1px solid black;
    &.one {
    }
    &.two {
      flex: 1;
    }
    &.three {
    }
  }
}
</style>
